Enrico silvestei



E. slLvEs-rni SKI Sept. 6, 1932.

Filed Mayfr. 19:51

Fig. 1

Patented Sept. 6, 1932 UNITED STATES ENRICO SILVESTRI, or MILAN, d ITALY. i

Application led May 7, 1931Seria1 No.,V 535,752, and inltalygMay 12,1930.,y

This invention relates to folding skis comprising two wooden ski-sections and a coupling for interconnectingv and rigidly fastening them in aligned Voperative position, and

I@ has for its object improvements in said cou- "jplings, Gn the annexed drawing an embodiment of this invention is illustrated by way of ex#- ample and n Figure 1 is a fragmentary vertical longi- V`tudinal section on line 1`1 of. Figure 2, of .fthe central portion of a ski in conditions for use; y g f l Figure 2 is a fragmentary plan view of lthe same; L f r* Figure 3 is a transverse section y.online 3-3ofFig.1; f i L' lFigure 4 is a transverse section on line4-`4 ofFigl; 20,' Figure 5 is a side view'of a coupling boxl having a wooden ski-'section connected therewith' Figure 6 is a side view of the end-portion of' the second wooden ski-section with its g5 metal connecting member; Figure 7 is a plan view of -F igure 6. As shown on' the, drawing a folding ski vaccording to this invention comprises two woodend sections 1k and`1 which may be located in folded condition whenthe ski isl out of use and in aligned and extended position when the ski is to be-used. V Said sections 1 and 1 are interconnected by a coupling comprising a metal-box yf2 which preferably is obtained by casting and which provides a tread 3 where thebearers shoe is located and bound by means of two \screwthreaded studsl 4 and 5 mo'untedin side wings 6 of box 2, one of said studsas having I a lock nut 7 provided witha inanipulating linger piece'7. Said box 2"provide's two side ribs 2 which extend down to embrace the bottom corners of the ski-sections 1, 1', the bearing surface of the ski beingthus -provided in the intermediate portionof the ski with metal linings which improve the operation. f *f Box 2 is'fastened'on the ski-sectionlli by Vmeans of side'screws Sand ofajtransverse y frame or bridgef9 which provides a part :sep-

head 10 of ski-section" 1.`

arate from the box 2 and 'is securedtherein by means of va riveted bolt This transverse frame isv machined to provide a recess 9 entered by the end of vski-section 1 and an outer rounded portion 9 encircled by side members 9,. ofsaid frame andadapted for engagement by4 a metal head. 10 lining vthe end of other ski-section 1 and fastened thereon by screws 21,. as hereinafterdescribed. The portion 2` of box 2`extending `beyond transverse member 4 pr'ovidessmooth faces inside its'side walls 2. and atits end it provides on its Vinternal horizontal surface a seat confined by frustroconical surfaces 11 and a horizontalk abutment 12,V A clamping screw 13 ,is located in the end portion of box 2, it being engaged in a bore of the wallof box 2 and engaging a screwthreaded bore 14 vof VSaid metal `head 10 providesa nose 15 with flat side surfaces 16 adapted to fit over the rounded portion 9 and between side membersQ" ofbridge 9 (Figp) andr also fiat side extensions 17 `andl8 by means of which it may fit in the recess of box ,extension 2.-

On the to face of head 1() and adjacent thel bore `14 or the clamping screw 13 a flat surface19Y is provided ifrom which rises a projection 20' having ,a tapering outer lsurface intended yto engage respectivelyl flat f facetr12 and seat 11 ofthe cooperating end of box 2. f. Owing to the described construction when the head 10 ofthel ski-section 1 is inserted'in the hollow of box 2 fastened on the end of other `section 1, said head 10 fits home therein'by nose 15 and surfaces 16, 17, 18 andv projection 20; by screwing down screw 13 whose studenga'ges bore-14,.said head 10 is forced against the bottom surface of the box 2 until its facet 19 abuts on box 'edge 12 and at the same time the-contacting surfaces of nose 15 and bridge 9 and projection 2O and seat 11respectively, are forced on eachother to firmly interengage the skisections. Y

The interengaging action isV improved by the fact that-'when tapering seat 11 isgforced by screw y13 *againstv tapering projection 20, 10(

provided on the box 2 and head 10. Thus the ski while consisting of two separate sections l, 1 is made entirely stiff andzthere.- fore a folding ski according to this invention has all useful features of a usual integrah ski when it is in operative conditions.

At the same time it is quite'easy to fold' down and extend the sk i sections, being only required to'manipulatescrew v13.

The two skisections 1, 1 may be interconnected by means of a chain or strap.(not shown) attached to an eye 22 ofV box 2 Figure 1) and to an eye 23 of head 10 (Figure 2) said eyes and the strap connecting them being enclosedin the box 2 `when ski is in extended condition.

The provision of coupling for the ski sections consisting of a cast metal box having machinedseats and fastened on one of the ski-sections and of a head fastenedvon'the other section and also made of castrnetal with'means for fitting in the. said box, ensuresra long andsafe life'of the ski and secures af true interchangeability of skisections.

What I claim as my inventionand desire Vto secure by United States Letters .Patent is z- 1.,A folding ski comprising a ski section, a metal box fastened on one kend of said ski section, av second ski sectiona metal' head fastenedA on one end of'said second ski section and yfitting in said box, a transverse member in said box having a curve surface, a nose on said head having a curve surface to mate with and engage said curve Vsurface of said transverse member, cooperating tapering surfaces on said box and head, and screw meansinter- `connectingsaidbox and head to force said tapering surfaces and said knose and transverse member on each other.

2. A folding sk i comprisinga ski section, a metal box fastened on ,one end of saidski section, a second ski section, a metal head fastened on one end of saidsecond ski section and enteringsaid box, a transverse member Ain said box and a nose on said head engaging said transverse member, cooperating abutting surfaces onsaid box and head, and means for forcing said nose and abutting surfacesof said nose and said transverse member and abutting surfaces of vsaid box on each other. Y l n 3,. A folding ski'comprising a ski section, a metal box fastened on one end of said ski sectionand extending therefromthe. side walls of said box reaching the levelof the bottorn edge lofsaid ski section, means .on said box for binding the wearers shoe thereon, a member in said box providing a seat and a transverse part, a tapering edge on said box facing said transverse part and an abutment on said box parallel with said ski section bottom edge, a second ski section, a metal headfastened on said second ski section and entering said extending portionvof said box said head providing a seat engaging said transverse part, a nose on said head fitting in saidzseatof saidamember, abutments on said head fitting in the side walls of said box, a tapering projection in said head engaging said box tapering edge, and a screw interengaging said box andheadprojection to clamp said boxiandlhead together. A

4. foldingvski comprising a ski section, ametalbox. fastened on one end of. said ski section, a second-ski section, a metal head fastened on one end ofsaid second ski section and fitting insaid box, a transverse member i in said box, a-nose on saidfhead to abut on and engage said transverse member, cooperating surfaces on said box and head for their abutmentin a directionopposite that of the abutmentv between said transverse member and nose, and screw ,means for interconnecting said box and head.

f 5.- Ai folding'- Icomprising a ski section, a metal box fastened on one end of said ski section, a ,secondr ski section, a metal head fastened on one end of said second ski section andlfittinginsaid box, a-transverse member in said box, a nose on said head to abut on and engage said transverse member, cooperating,taperingsurfaces .on said boxV and head for their .abutment in a direction opposite that ofthe abutmentzbetween said transverse member and nose, and screw means for interconnecting said box and head and forcing said tapering surfaces and said ltransverse member and` nose against-each other.V 6.- A-foldingfvski-comprising a ski section, a metal box fastened on one end of said ski section, ea second skisection, a metal head fastened'on one end of said second Ski section and fitting in said box, a transverse member-in said box, a nose on said head to engage said transverse member, a curve tapering surface on said box, said surface having its concavity facing-*said i transverse member, a-tapering.surface.on said head for cooperation with said-box curve tapering surface, and screwpmeans interconnecting said box and head and forcingsaid tapering surfaces and said nose and-transverse memberagainst each other. Y

7. A foldingski comprisingv a ski section, a-metal boxffastened-on one end of said ski section, a secondskisection, ametal head fastened .onfone endgof. said second ski section and fitting in said box, a member fastened in, transverse.. positiont lwithin said` box, said member Lhaving a surfaceprofiled, according tofan are ofa circle andgcarrying'V projecting ilo wings with fiat internal surfaces, a nose on said head having a profiled surface to abut on and engage said profiled surface of said trans Verse member, cooperatingsurfaces on said box and head for their abutment in a direction opposite that of the abutment of said transverse member and nose, and screw means for interconnecting said box and head. K

` 8. A folding ski comprising ya ski section, a metal box fastened on one end of said ski section, a second ski section, a metal head fastened on one end of said second ski section and entering said box, mating machined surfaces in the interior of said box and on said head forming abutments in upward direction in both transverse directions and in both longitudinal directions and screw means for interconnecting said box and head.

9. A folding ski comprising a ski section,

a metal box fastened on one en'd of said ski i section, a second ski section, ametal head fastened on one end of said second skl section and entering said box, mating machined surfaces in the interior of said box and on said head forming abutments in upward direction in both transverse directions vand in both longitudinal directions and screw means for interconnecting said box and head and forcing against each other said surfaces forming abutments in the longitudinal direction.

In testimony whereof I have signed my name to this specification.`

ENRICO SILVESTRI. 

